How much 30.0% commercial fluorosilicic acid in kg must be added to 50,000 gallons of water in order to fluoridate at the optimum level? Please help

not clear

indicate valleys, hills, steepness and gentleness of slopes.

explanation:

contour lines on a map indicate elevation, or depth. numeric notations on contour lines refer to the level of elevation, or height about sea level.

it would be d. henry moseley

hope this !

and sorry if i'm late. have a good rest of your day! : d

if you're asking what comes out, it's steam.